Results 1 to 4 of 4

Thread: Mutron Flanger - Weak Effect

  1. #1
    Ted
    Ted is offline
    Senior Member
    Join Date
    May 2007
    Location
    London
    Posts
    292

    Mutron Flanger - Weak Effect

    I have a Mutron Flanger here. The effect is present but seems very weak - the signal is noticeably lower with the effect switched in than when it's bypassed. Would this be a symptom of the SAD1024 bucket brigade delay chip starting to fail?
    Any suggestions?

  2. #2
    Supporting Member
    Join Date
    Dec 2009
    Location
    UK
    Posts
    2,837
    I've only ever had these chips where they've failed to produce any delay and give no output. The fact you're getting any effect suggests that your problem lies elsewhere. The first think I'd check is to make sure the DC voltages are all correct. I get plenty of older pedals where the electrolytics have high ESR. Sometimes they bulge, but this isn't always the case. A bad cap can give you serious signal loss, depending where it is.

    Can you post a link to the schematic?

  3. #3
    Ted
    Ted is offline
    Senior Member
    Join Date
    May 2007
    Location
    London
    Posts
    292

    Schematic

    Schematic enclosed.

    Lots of small coupling electrolytics
    Attached Files Attached Files

  4. #4
    Supporting Member
    Join Date
    Dec 2009
    Location
    UK
    Posts
    2,837
    If you have an in-circuit ESR meter you can quickly eliminate the caps. If not then tracing a test signal though would be my next step. I find an audio probe is often a quick way to locate where a signal is dropping with FX pedals. Just be sure to check the DC voltages are correct before any further troubleshooting.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Set of PCBs for building a Mutron Biphase
    By Van Esch in forum Flea Market
    Replies: 0
    Last Post: 03-01-2017, 06:49 PM
  2. Weak reverb, or...what's weak this week
    By bassistbobby in forum Guitar Amps
    Replies: 35
    Last Post: 07-30-2015, 10:38 PM
  3. Mutron Biphase
    By Van Esch in forum Guitar Effects
    Replies: 1
    Last Post: 06-25-2015, 12:38 PM
  4. FS - Mutron Bi-Phase
    By cjlectronics in forum Flea Market
    Replies: 2
    Last Post: 03-17-2014, 09:35 PM
  5. ID this switch for a Mutron AutoWah w/photo
    By PRNDL in forum Maintenance, Troubleshooting & Repair
    Replies: 6
    Last Post: 06-12-2008, 05:36 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •